This is the OP. It's based on color. When called on his racism, the OP whines:
So the OP poses a hypothetical based on seeing color and not people, but has the temerity to say something about seeing color as if he isn't.
You see, when a person tries to create a hypothetical based on his or her own racist beliefs, they ignore whole lot of things. In America, if not for blacks, Native Americans, and Asians, the wealth America has would not exist. White American wealth was literally made on the backs of slaves. Not just by their labor, but by selling slave-backed securities globally.
I am going to be generous in my assessment because the history of this country, as well as many white European countries, is based on wealth gained by stealing the resources of non white countries. Given that history, one could reasonably conclude that the white continent would fail.
Now to answer the question, if both countries are allowed to run their own government without interference, colonization, or excluding populations from funds or development, both countries will be equally successful.